import qualified Data.Map as Map (lookup)
import Data.Time (getCurrentTime)
-import System.IO (Handle, hClose, hFlush)
import qualified Data.ByteString.Lazy as B (ByteString, hPut)
import Data.String.Utils (split, strip)
import Data.Maybe (catMaybes, fromJust, isNothing)
+import Prelude hiding (readFile)
+import System.Directory (doesFileExist)
+import System.IO (Handle, hClose, hFlush, hPutStrLn, stderr)
+import System.IO.UTF8 (readFile)
import Test.HUnit (Assertion, assertEqual)
import Test.Framework (Test, testGroup)
import Test.Framework.Providers.HUnit (testCase)
import Text.XML.HXT.Core (
ArrowXml,
IOSArrow,
+ IOStateArrow,
XmlTree,
(>>>),
(/>),
when)
import Text.HandsomeSoup (css, parseHtml)
+import Configuration (Cfg, password, use_account, username)
import LWN.Article
-import LWN.HTTP (ImageMap, download_image_urls)
+import LWN.HTTP (
+ ImageMap,
+ download_image_urls,
+ get_page,
+ log_in,
+ make_cookie_jar)
import LWN.URI (URL, try_make_absolute_url)
-import LWN.XHTML (XHTML, to_xhtml)
+import LWN.XHTML (XHTML, parse_lwn, to_xhtml)
import Misc (contains)
+
+-- | Try to parse the given article using HXT. We try a few different
+-- methods; if none of them work, we return 'Nothing'.
+get_xml_from_article :: Cfg -> URL -> IO (Maybe (IOStateArrow s b XmlTree))
+get_xml_from_article cfg article_name = do
+ my_article <- real_article_path article_name
+ is_file <- doesFileExist my_article
+ case is_file of
+ True -> do
+ contents <- readFile my_article
+ return $ Just $ parse_lwn contents
+ False -> do
+ -- Download the URL and try to parse it.
+ if use_account cfg then do
+ -- use_account would be false if these fromJusts would fail.
+ cj <- make_cookie_jar
+ li_result <- log_in cj
+ (fromJust $ username cfg)
+ (fromJust $ password cfg)
+
+ case li_result of
+ Left err -> do
+ let msg = "Failed to log in. " ++ err
+ hPutStrLn stderr msg
+ Right response_body -> do
+ hPutStrLn stderr response_body
+
+ html <- get_page (Just cj) my_article
+
+ case html of
+ Left err -> do
+ let msg = "Failed to retrieve page. " ++ err
+ hPutStrLn stderr msg
+ return Nothing
+ Right h -> return $ Just $ parse_lwn h
+ else do
+ html <- get_page Nothing my_article
+ case html of
+ Left err -> do
+ let msg = "Failed to retrieve page. " ++ err
+ hPutStrLn stderr msg
+ return Nothing
+ Right h -> return $ Just $ parse_lwn h
+
+
+
-- Should be called *after* preprocessing.
download_images :: IOSArrow XmlTree XmlTree -> IO ImageMap
download_images xml = do
" <title>" ++ (show $ LWN.Article.title a) ++ "</title>" ++
"</head>" ++
"<body>" ++
- "<div>" ++
(to_xhtml a) ++
- "</div>" ++
"</body>" ++
"</html>"
+page_from_url :: Cfg -> URL -> IO (Maybe Page)
+page_from_url cfg url = do
+ maybe_html <- get_xml_from_article cfg url
+ case maybe_html of
+ Just html -> parse html
+ Nothing -> return Nothing
+
+
is_link :: (ArrowXml a) => a XmlTree XmlTree
is_link =
isElem >>> hasName "a"